package cn.codeim;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

public class TimeServer {

    public void bind(int port) throws InterruptedException {
        NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        NioEventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 1024)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel arg0) throws Exception {
                            arg0.pipeline().addLast(new LineBasedFrameDecoder(1024));
                            arg0.pipeline().addLast(new StringDecoder());
                            arg0.pipeline().addLast(new TimeServerHandler());
                        }
                    });

            //绑定端口，等待同步成功
            ChannelFuture f = b.bind(port).sync();

            //等待监听端口关闭
            f.channel().closeFuture().sync();

        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        int port = 8080;
        if(args != null && args.length > 0) {
            try {
                port = Integer.parseInt(args[0]);
            }catch (NumberFormatException e) {
                System.out.println(e.getMessage());
            }
        }

        new TimeServer().bind(port);
    }
}
